COPT Defense Properties
US ˙ NYSE

SecurityCDP / COPT Defense Properties
InstitutionSei Investments Co
Latest Disclosed Ownership2,299,926 shares
Latest Disclosed Value $ 63,938,016
Sei Investments Co reports 0.97% decrease in ownership of CDP / COPT Defense Properties

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 2,299,926 shares of COPT Defense Properties (US:CDP) valued at $63,937,943 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 2,322,515 shares of COPT Defense Properties. This represents a change in shares of -0.97% during the quarter. The current value of the position is $72,010,683 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-02-13 2025-12-31 13F COPT DEFENSE PROPERTIES SHS BEN INT 22002T108 2,299,926 -22,589 -0.97 63,938 -5.27 0.0631
2025-11-13 2025-09-30 13F COPT DEFENSE PROPERTIES SHS BEN INT 22002T108 2,322,515 128,275 5.85 67,492 11.53 0.0726
2025-08-14 2025-06-30 13F COPT DEFENSE PROPERTIES SHS BEN INT 22002T108 2,194,240 105,845 5.07 60,517 6.26 0.0701
2025-05-14 2025-03-31 13F/A-1 COPT DEFENSE PROPERTIES SHS BEN INT 22002T108 2,088,395 -51,060 -2.39 56,951 -13.99 0.0733
2025-05-13 2025-03-31 13F COPT DEFENSE PROPERTIES SHS BEN INT 22002T108 2,141,259 1,804 66,158 0.0720
2025-02-11 2024-12-31 13F COPT DEFENSE PROPERTIES SHS BEN INT 22002T108 2,139,455 24,577 1.16 66,216 3.23 0.0850
2024-11-12 2024-09-30 13F COPT DEFENSE PROPERTIES SHS BEN INT 22002T108 2,114,878 131,352 6.62 64,144 29.20 0.0833
2024-08-13 2024-06-30 13F COPT DEFENSE PROPERTIES SHS BEN INT 22002T108 1,983,526 174,206 9.63 49,648 13.53 0.0703
2024-05-07 2024-03-31 13F COPT DEFENSE PROPERTIES SHS BEN INT 22002T108 1,809,320 44,070 2.50 43,731 -3.34 0.0641
2024-02-14 2023-12-31 13F COPT DEFENSE PROPERTIES SHS BEN INT 22002T108 1,765,250 316,134 21.82 45,243 31.02 0.0726
2023-11-14 2023-09-30 13F COPT DEFENSE PROPERTIES SHS BEN INT 22002T108 1,449,116 169,155 13.22 34,532 13.60 0.0621
2023-08-11 2023-06-30 13F CORPORATE OFFICE PPTYS TR SH BEN INT 22002T108 1,279,961 -80,668 -5.93 30,399 -5.77 0.0530
2023-05-12 2023-03-31 13F CORPORATE OFFICE PPTYS TR SH BEN INT 22002T108 1,360,629 -188,537 -12.17 32,261 -19.72 0.0599
2023-02-10 2022-12-31 13F CORPORATE OFFICE PPTYS TR SH BEN INT 22002T108 1,549,166 162,801 11.74 40,185 24.78 0.0893
2022-11-14 2022-09-30 13F CORPORATE OFFICE PPTYS TR SH BEN INT 22002T108 1,386,365 283,347 25.69 32,205 11.48 0.0718
2022-08-15 2022-06-30 13F CORPORATE OFFICE PPTYS TR SH BEN INT 22002T108 1,103,018 474,261 75.43 28,889 60.99 0.0624
2022-05-13 2022-03-31 13F CORPORATE OFFICE PPTYS TR SH BEN INT 22002T108 628,757 -89,096 -12.41 17,945 -10.65 0.0361
2022-02-14 2021-12-31 13F CORPORATE OFFICE PPTYS TR SH BEN INT 22002T108 717,853 26,287 3.80 20,083 7.63 0.0377
2021-11-12 2021-09-30 13F CORPORATE OFFICE PPTYS TR SH BEN INT 22002T108 691,566 691,566 18,659 0.0391
2021-02-08 2020-12-31 13F CORPORATE OFFICE PPTYS TR SH BEN INT 22002T108 0 -207,526 -100.00 0 -100.00
2020-12-04 2020-09-30 13F/A-1 CORPORATE OFFICE PPTYS TR SH BEN INT 22002T108 207,526 -3,490 -1.65 4,944 -7.59 0.0143
2020-11-06 2020-09-30 13F CORPORATE OFFICE PPTYS TR SH BEN INT 22002T108 209,300 -1,716 4,986 12,005.1794
2020-08-17 2020-06-30 13F/A-1 CORPORATE OFFICE PPTYS TR SH BEN INT 22002T108 211,016 -194,422 -47.95 5,350 -40.47 0.0166
2020-08-11 2020-06-30 13F CORPORATE OFFICE PPTYS TR SH BEN INT 22002T108 438,558 33,120 12,852 34,861.7341
2020-05-14 2020-03-31 13F CORPORATE OFFICE PPTYS TR SH BEN INT 22002T108 405,438 -31,644 -7.24 8,987 -30.16 0.0330
2020-02-06 2019-12-31 13F CORPORATE OFFICE PPTYS TR SH BEN INT 22002T108 437,082 -9,902 -2.22 12,868 -3.51 0.0384
2019-11-12 2019-09-30 13F CORPORATE OFFICE PPTYS TR SH BEN INT 22002T108 446,984 157,270 54.28 13,336 74.03 0.0341
2019-08-14 2019-06-30 13F CORPORATE OFFICE PPTYS TR SH BEN INT 22002T108 289,714 41,103 16.53 7,663 12.62 0.0250
2019-05-15 2019-03-31 13F CORPORATE OFFICE PPTYS TR SH BEN INT 22002T108 248,611 119,583 92.68 6,804 78.68 0.0229
2019-02-13 2018-12-31 13F CORPORATE OFFICE PPTYS TR SH BEN INT 22002T108 129,028 2,290 1.81 3,808 0.61 0.0136
2018-11-08 2018-09-30 13F CORPORATE OFFICE PPTYS TR SH BEN INT 22002T108 126,738 -30,120 -19.20 3,785 -16.76 0.0137
2018-08-03 2018-06-30 13F CORPORATE OFFICE PPTYS TR SH BEN INT 22002T108 156,858 6,735 4.49 4,547 17.25 0.0155
2018-05-11 2018-03-31 13F CORPORATE OFFICE PPTYS TR SH BEN INT 22002T108 150,123 -74,114 -33.05 3,878 -40.78 0.0149
2018-02-08 2017-12-31 13F CORPORATE OFFICE PPTYS TR SH BEN INT 22002T108 224,237 -142,784 -38.90 6,548 -45.66 0.0227
2017-11-06 2017-09-30 13F CORPORATE OFFICE PPTYS TR SH BEN INT 22002T108 367,021 25,344 7.42 12,050 0.68 0.0428
2017-07-31 2017-06-30 13F CORPORATE OFFICE PPTYS TR SH BEN INT 22002T108 341,677 90,502 36.03 11,969 43.96 0.0477
2017-05-05 2017-03-31 13F CORPORATE OFFICE PPTYS TR SH BEN INT 22002T108 251,175 165,593 193.49 8,314 211.27 0.0364
2017-02-02 2016-12-31 13F CORPORATE OFFICE PPTYS TR SH BEN INT 22002T108 85,582 65,961 336.18 2,671 379.53 0.0129
2016-11-04 2016-09-30 13F CORPORATE OFFICE PPTYS TR SH BEN INT 22002T108 19,621 -16,138 -45.13 557 -47.35 0.0028
2016-08-11 2016-06-30 13F CORPORATE OFFICE PPTYS TR SH BEN INT 22002T108 35,759 -17,943 -33.41 1,058 -24.91 0.0063
2016-05-10 2016-03-31 13F/A-1 CORPORATE OFFICE PPTYS TR SH BEN INT 22002T108 53,702 -13,747 -20.38 1,409 -4.34 0.0088
2016-02-03 2015-12-31 13F CORPORATE OFFICE PPTYS TR SH BEN INT 22002T108 67,449 66,468 6,775.54 1,473 6,914.29 0.0090
2015-11-02 2015-09-30 13F/A-1 CORPORATE OFFICE PPTYS TR SH BEN INT 22002T108 981 -8,713 -89.88 21 -90.79 0.0002
2015-10-30 2015-09-30 13F CORPORATE OFFICE PPTYS TR SH BEN INT 22002T108 981 22
2015-08-07 2015-06-30 13F/A-1 CORPORATE OFFICE PPTYS TR SH BEN INT 22002T108 9,694 -61,534 -86.39 228 -89.09 0.0021
2015-08-04 2015-06-30 13F CORPORATE OFFICE PPTYS TR SH BEN INT 22002T108 9,694 -61,534 228 0.0021
2015-05-14 2015-03-31 13F/A-1 CORPORATE OFFICE PPTYS TR SH BEN INT 22002T108 71,228 5,770 8.81 2,089 12.74 0.0181
2015-05-01 2015-03-31 13F CORPORATE OFFICE PPTYS TR SH BEN INT 22002T108 71,228 2,089
2015-02-10 2014-12-31 13F CORPORATE OFFICE PPTYS TR SH BEN INT 22002T108 65,458 65,458 1,853 0.0164
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.